Threshold_LTAbs, Threshold

Intel® Integrated Performance Primitives (Intel® IPP) Developer Guide and Reference

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ID 790148

Date 3/22/2024

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Threshold_LTAbs, Threshold_GTAbs

Performs the threshold operation on the absolute values of elements of a vector.

Syntax

IppStatus ippsThreshold_LTAbs_16s(const Ipp16s* pSrc, Ipp16s* pDst, int len, Ipp16s level);

IppStatus ippsThreshold_LTAbs_32s(const Ipp32s* pSrc, Ipp32s* pDst, int len, Ipp32s level);

IppStatus ippsThreshold_LTAbs_32f(const Ipp32f* pSrc, Ipp32f* pDst, int len, Ipp32f level);

IppStatus ippsThreshold_LTAbs_64f(const Ipp64f* pSrc, Ipp64f* pDst, int len, Ipp64f level);

IppStatus ippsThreshold_GTAbs_16s(const Ipp16s* pSrc, Ipp16s* pDst, int len, Ipp16s level);

IppStatus ippsThreshold_GTAbs_32s(const Ipp32s* pSrc, Ipp32s* pDst, int len, Ipp32s level);

IppStatus ippsThreshold_GTAbs_32f(const Ipp32f* pSrc, Ipp32f* pDst, int len, Ipp32f level);

IppStatus ippsThreshold_GTAbs_64f(const Ipp64f* pSrc, Ipp64f* pDst, int len, Ipp64f level);

IppStatus ippsThreshold_GTAbs_16s_I(Ipp16s* pSrcDst, int len, Ipp16s level);

IppStatus ippsThreshold_GTAbs_32s_I(Ipp32s* pSrcDst, int len, Ipp32s level);

IppStatus ippsThreshold_GTAbs_32f_I(Ipp32f* pSrcDst, int len, Ipp32f level);

IppStatus ippsThreshold_GTAbs_64f_I(Ipp64f* pSrcDst, int len, Ipp64f level);

IppStatus ippsThreshold_LTAbs_16s_I(Ipp16s* pSrcDst, int len, Ipp16s level);

IppStatus ippsThreshold_LTAbs_32s_I(Ipp32s* pSrcDst, int len, Ipp32s level);

IppStatus ippsThreshold_LTAbs_32f_I(Ipp32f* pSrcDst, int len, Ipp32f level);

IppStatus ippsThreshold_LTAbs_64f_I(Ipp64f* pSrcDst, int len, Ipp64f level);

Include Files

ipps.h

Domain Dependencies

Headers: ippcore.h, ippvm.h

Libraries: ippcore.lib, ippvm.lib

Parameters

pSrc	Pointer to the source vector.
pDst	Pointer to the destination vector.
pSrcDst	Pointer to the source and destination vector for the in-place operation.
len	Number of elements in the vector.
level	Value used to limit each element of source vector. This argument can not be negative.

Description

These functions implement thresholding of the vector pSrc by limiting absolute value of each element by the threshold value level. These functions perform the compare operation of the fixed type: ippsThreshold_LTAbs is for the "less than" comparison, while ippsThreshold_GTAbs is for the "greater than" comparison. Elements of the result vector pDst have the same sign that the source elements.

The in-place flavors perform the threshold operation on the vector pSrcDst.

ippsThreshold_LTAbs. The ippsThreshold_LTAbsfunction performs the operation “less than”, and level is a lower bound for the input. The formula for ippsThreshold_LTAbs is the following:

ippsThreshold_GTAbs. The function ippsThreshold_GTAbs performs the operation “greater than” and level is an upper bound for the input. The formula for ippsThreshold_GTAbs is the following:

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error if pSrc, pDst, or pSrcDst pointer is NULL.
ippStsSizeErr	Indicates an error if len is less than or equal to zero.
ippStsThreshNegLevelErr	Indicates an error if level is negative.

Example

Threshold_LtAbs:

/*******************************************************************************
* Copyright 2015 Intel Corporation.
*
*
* This software and the related documents are Intel copyrighted materials, and your use of them is governed by
* the express license under which they were provided to you ('License'). Unless the License provides otherwise,
* you may not use, modify, copy, publish, distribute, disclose or transmit this software or the related
* documents without Intel's prior written permission.
* This software and the related documents are provided as is, with no express or implied warranties, other than
* those that are expressly stated in the License.
*******************************************************************************/

#include <stdio.h>
#include "ipp.h"

/* Next two defines are created to simplify code reading and understanding */
#define EXIT_MAIN exitLine:                                  /* Label for Exit */
#define check_sts(st) if((st) != ippStsNoErr) goto exitLine; /* Go to Exit if Intel(R) Integrated Performance Primitives (Intel(R) IPP) function returned status different from ippStsNoErr */

/* Results of ippMalloc() are not validated because Intel(R) IPP functions perform bad arguments check and will return an appropriate status  */

int main()
{
    Ipp32f pVals[] = { 1, -3, 5, -7, 18, -24, 35, 48 };
    Ipp32f pOutVals[8];
    IppStatus status;
    int i;

    printf("Source vector\n");
    for (i = 0; i < 8; i++) printf("%f ", pVals[i]);

    check_sts(status = ippsThreshold_LTAbs_32f(pVals, pOutVals, 8, 10));

    printf("Result values vector\n");
    for (i = 0; i < 8; i++) printf("%f ", pOutVals[i]);

EXIT_MAIN
    printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status));
    return (int)status;
}

Threshold_LtAbs_I:

/*******************************************************************************
* Copyright 2015 Intel Corporation.
*
*
* This software and the related documents are Intel copyrighted materials, and your use of them is governed by
* the express license under which they were provided to you ('License'). Unless the License provides otherwise,
* you may not use, modify, copy, publish, distribute, disclose or transmit this software or the related
* documents without Intel's prior written permission.
* This software and the related documents are provided as is, with no express or implied warranties, other than
* those that are expressly stated in the License.
*******************************************************************************/

#include <stdio.h>
#include "ipp.h"

/* Next two defines are created to simplify code reading and understanding */
#define EXIT_MAIN exitLine:                                  /* Label for Exit */
#define check_sts(st) if((st) != ippStsNoErr) goto exitLine; /* Go to Exit if Intel(R) Integrated Performance Primitives (Intel(R) IPP) function returned status different from ippStsNoErr */

/* Results of ippMalloc() are not validated because Intel(R) IPP functions perform bad arguments check and will return an appropriate status  */

int main()
{
    Ipp32f pVals[] = { 1, -3, 5, -7, 18, -24, 35, 48 };
    IppStatus status;
    int i;

    printf("Source vector\n");
    for (i = 0; i < 8; i++) printf("%f ", pVals[i]);

    check_sts(status = ippsThreshold_LTAbs_32f_I(pVals, 8, 10));

    printf("Result values vector\n");
    for (i = 0; i < 8; i++) printf("%f ", pVals[i]);

EXIT_MAIN
    printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status));
    return (int)status;
}

Parent topic: Conversion Functions

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